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package org.apache.impala.calcite.rel.node;

import org.apache.impala.common.ImpalaException;


/**
 * ImpalaPlanRel. Interface used for all Impala intermediary RelNodes
 */
public interface ImpalaPlanRel {

  /**
   * getPlanNode returns a NodeWithExprs object, a thin structure containing
   * the plan node along with the output expressions generated by the plan node.
   */
  public NodeWithExprs getPlanNode(ParentPlanRelContext context) throws ImpalaException;

}
